a torch bulb when cold has 1 ohm resistance .it draws a current of 0.3A when glowing from a source of 3 v.calculate the resistance of the bulb when glowing and explain the reason for the difference in resistance. i will like the ans sure if ans is right
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Reason for differenence in resistance is=>
*Heat = I^2 R t,,,,,I-current,,,R-resistance,,t-time
*while bulb glows heat is produced and since heat is directly propotional to resistance (point 1),,,,,,,, resistance increases with the heat, ,,
SO THERE IS A DIFFERENCE IN RESISTENCE.
*Heat = I^2 R t,,,,,I-current,,,R-resistance,,t-time
*while bulb glows heat is produced and since heat is directly propotional to resistance (point 1),,,,,,,, resistance increases with the heat, ,,
SO THERE IS A DIFFERENCE IN RESISTENCE.
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